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Metals and alloys
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* Indicates required question
What type of bond forms between metal atoms?
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1 point
covalent bond
ionic bond
metallic bond
Brass is an alloy of copper (Cu) and zinc (Zn). What type of bonding occurs in brass?
1 point
covalent bonding
metallic boinding
ionic bonding
Clear selection
Match the property to the definition
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3 points
can be bent into shape without breaking
does not scratch easily
can be drawn into thin wires
hard
malleable
ductile
can be bent into shape without breaking
does not scratch easily
can be drawn into thin wires
hard
malleable
ductile
Which three of the following are typical physical properties of metals?
3 points
high density
low density
malleable
brittle
ductile
Large numbers of metal atoms bonded together form a...
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1 point
giant ionic lattice
simple molecule
giant covalent lattice
giant metallic lattice
Which diagram represents a metallic structure?
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1 point
A
B
C
D
E
In a metallic lattice, the metal atoms lose the outer shell electrons. What name is given to an atom that has lost one or more electrons? Tick two.
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2 points
negative ion
positive ion
cation
anion
Required
A metallic lattice has layers of positive metal ions surrounded by a sea of...
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1 point
delocalised protons
delocalised neutrons
delocalised electrons
anion
Which two properties are due to the delocalised electrons?
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2 points
high melting points
high boiling points
good electrical conductor
good thermal conductor
Complete the sentence: metallic bond are the...
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1 point
strong attraction between ions of opposite charge
strong attraction between positive ions and positive electrons
strong attraction between negative ions and delocalised electrons
Which typical property of metals is due to strong metallic bonds?
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1 point
good electrical conductor
good thermal conductor
malleable
ductile
high melting points
Why are metals good conductors of electricity?
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1 point
The delocalised electrons transfer energy
The metal ions are arranged in layers
The metal ions are closely packed together
The delocalised electrons are free to move through the structure
Why do metals typically have a high density?
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1 point
The delocalised electrons transfer energy
The metal ions are arranged in layers
The metal ions are closely packed together
The delocalised electrons are free to move through the structure
Why are metals malleable and ductile?
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1 point
The delocalised electrons transfer energy
The metal ions are arranged in layers
The metal ions are closely packed together
The delocalised electrons are free to move through the structure
What is an alloy?
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1 point
A compound of a metal and one or more elements
A mixture of a metal and one or more elements
Why are alloys generally harder than pure metals
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1 point
The elements added to the metal are harder than the metal atoms
The atoms added to the metal are of different size and distort the regular structure. This means that layers cannot slide easily any more.
The bonds between the metal and the other atoms are stronger than the bonds between the metal atoms. .
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